Fluctuations in viscous fingering.
Fluctuations in viscous fingering.
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粘性指法的波动。
DOI：
10.1103/physreve.65.030601
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
H. Swinney
中科院分区：
文献类型：
--
作者：
M. G. Moore;A. Juel;J. M. Burgess;W. D. McCormick;H. Swinney
我们的实验在Hele-Shaw通道的粘性（Saffman-Taylor）指进揭示手指宽度的波动，没有观察到在以前的实验中，具有较低的纵横比和较高的毛细管数Ca。这些波动间歇性地使手指从其预期宽度变窄。这些波动的幅度由幂律Ca（-0.64）描述，该幂律适用于所研究的直到尖端不稳定性开始的所有纵横比。此外，对于大的纵横比，平均指宽表现出最大值作为Ca的减少，而不是预测的单调增加。
Our experiments on viscous (Saffman-Taylor) fingering in Hele-Shaw channels reveal finger width fluctuations that were not observed in previous experiments, which had lower aspect ratios and higher capillary numbers Ca. These fluctuations intermittently narrow the finger from its expected width. The magnitude of these fluctuations is described by a power law, Ca(-0.64), which holds for all aspect ratios studied up to the onset of tip instabilities. Further, for large aspect ratios, the mean finger width exhibits a maximum as Ca is decreased instead of the predicted monotonic increase.